schemaGenerator: func(max *int64) *schema.Structural {
				strType := withMaxLength(primitiveType("string", ""), max)
				beforeLen := int64(2)
				afterLen := int64(4)
				objType := objectType(map[string]schema.Structural{
					"str":    strType,
					"before": withMaxLength(primitiveType("string", ""), &beforeLen),
					"after":  withMaxLength(primitiveType("string", ""), &afterLen),
				})

		{
			Rule: rule,
		},
	}
	return s
}

func cloneWithRule(s *schema.Structural, rule string) *schema.Structural {
	s = s.DeepCopy()
	return withRulePtr(s, rule)
}

func withMaxLength(s schema.Structural, maxLength *int64) schema.Structural {
	if s.ValueValidation == nil {
		s.ValueValidation = &schema.ValueValidation{}
	}
	s.ValueValidation.MaxLength = maxLength
	return s
}